Ortlieb Velocity Waterproof Backpack
The Ortlieb Velocity backpack is ideal for those commuters who don't want a rack on their bike, but still need a hard-wearing, waterproof bag. Comes with padded shoulder straps, plus an optional waist belt. The closure is a roll-top secured by a velcro strap, for quick access that doesn't compromise on waterproofing.
Ortlieb bags come with a 5-year warranty, which is a testament to their quality.